structure

#include <iostream>
#include <fstream>
using namespace std;

struct CityPollution
{
    string name;
    int id;
    float pollution[5], totalPollution=0;
};

void displayAllData(CityPollution);

int main()
{
    CityPollution city0;

    cout << "Area name: ";
    cin >> city0.name;
    cout << "ID number: ";
    cin >> city0.id;

    for (int i=0; i<5; i++)
    {
        cout << "Pollution reading " << i+1 << " : ";
        cin >> city0.pollution[i];
        city0.totalPollution += city0.pollution[i];
    }

    displayAllData(city0);

    ofstream dataFile("pollutionData.txt");
    dataFile << "City name: " << city0.name << endl;
    dataFile << "City ID: " << city0.id << endl;
    dataFile << "Total pollution: " << city0.totalPollution;
    dataFile.close();
}

void displayAllData(CityPollution city0)
{
    cout << "\nCity name: " << city0.name << endl;
    cout << "City ID: " << city0.id << endl;
    cout << "Total pollution: " << city0.totalPollution;
}